Background Fish classifications, as those of most other taxonomic groups, are being
transformed drastically as new molecular phylogenies provide support for natural groups …

Freshwater sculpins, grouped by their common ecological characteristic of freshwater
habitats, comprise the species from the genera Cottus, Trachidermus, Mesocottus and …

The field of speciation has seen much renewed interest in the past few years, with
theoretical and empirical advances that have moved it from a descriptive field to a predictive …

Widespread evidence shows that the modern rates of extinction in many plants and animals
exceed background rates in the fossil record. In the present article, I investigate this issue …

African cichlids formerly referred to as” Tilapia” represent a paraphyletic species
assemblage belonging to the so called haplotilapiine lineage which gave rise to the …

The high levels of biodiversity supported by mountains suggest a possible link between
geologic processes and biological evolution. Freshwater biodiversity is high not only in …

The origin of species remains a central question, and recent research focuses on the role of
ecological differences in promoting speciation. Ecological differences create opportunities …

Phylogenetic trees that include all member lineages are necessary for many questions in
macroevolution, biogeography and conservation. Currently, producing such trees when …

The family Melanotaeniidae (rainbowfishes) represents the largest monophyletic group of
freshwater fishes found in Australia and New Guinea. The family consists of seven genera …

The Acanthomorpha is the largest group of teleost fishes with about one third of extant
vertebrate species. In the course of its evolution this lineage experienced several episodes …